otk/truerendercontrol.cc (raw)
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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*- #ifdef HAVE_CONFIG_H # include "../config.h" #endif // HAVE_CONFIG_H #include "truerendercontrol.hh" #include "display.hh" #include "screeninfo.hh" extern "C" { #ifdef HAVE_STDLIB_H # include <stdlib.h> #endif // HAVE_STDLIB_H #include "gettext.h" #define _(str) gettext(str) } namespace otk { TrueRenderControl::TrueRenderControl(const ScreenInfo *screen) : RenderControl(screen) { printf("Initializing TrueColor RenderControl\n"); unsigned long red_mask, green_mask, blue_mask; // find the offsets for each color in the visual's masks red_mask = screen->visual()->red_mask; green_mask = screen->visual()->green_mask; blue_mask = screen->visual()->blue_mask; while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; } while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; } while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; } // use the mask to determine the number of bits for each shade of color // so, best case, red_mask == 0xff (255), with each bit as a different // shade! _red_bits = 255 / red_mask; _green_bits = 255 / green_mask; _blue_bits = 255 / blue_mask; // compute color tables, based on the number of bits for each shade for (int i = 0; i < 256; i++) { _red_color_table[i] = i / _red_bits; _green_color_table[i] = i / _green_bits; _blue_color_table[i] = i / _blue_bits; } } TrueRenderControl::~TrueRenderControl() { printf("Destroying TrueColor RenderControl\n"); } static inline void assignPixel(unsigned int bit_depth, unsigned char **data, unsigned long pixel) { unsigned char *pixel_data = *data; switch (bit_depth) { case 8: // 8bpp *pixel_data++ = pixel; break; case 16: // 16bpp LSB *pixel_data++ = pixel; *pixel_data++ = pixel >> 8; break; case 17: // 16bpp MSB *pixel_data++ = pixel >> 8; *pixel_data++ = pixel; break; case 24: // 24bpp LSB *pixel_data++ = pixel; *pixel_data++ = pixel >> 8; *pixel_data++ = pixel >> 16; break; case 25: // 24bpp MSB *pixel_data++ = pixel >> 16; *pixel_data++ = pixel >> 8; *pixel_data++ = pixel; break; case 32: // 32bpp LSB *pixel_data++ = pixel; *pixel_data++ = pixel >> 8; *pixel_data++ = pixel >> 16; *pixel_data++ = pixel >> 24; break; case 33: // 32bpp MSB *pixel_data++ = pixel >> 24; *pixel_data++ = pixel >> 16; *pixel_data++ = pixel >> 8; *pixel_data++ = pixel; break; } *data = pixel_data; // assign back so we don't lose our place } void renderPixel(XImage *im, unsigned char *dp, unsigned long pixel) { unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst) ? 1 : 0; printf("%lx \n", pixel); switch (bpp) { case 8: // 8bpp *dp++ = pixel; break; case 16: // 16bpp LSB *dp++ = pixel; *dp++ = pixel >> 8; break; case 17: // 16bpp MSB *dp++ = pixel >> 8; *dp++ = pixel; break; case 24: // 24bpp LSB *dp++ = pixel; *dp++ = pixel >> 8; *dp++ = pixel >> 16; break; case 25: // 24bpp MSB *dp++ = pixel >> 16; *dp++ = pixel >> 8; *dp++ = pixel; break; case 32: // 32bpp LSB *dp++ = pixel; *dp++ = pixel >> 8; *dp++ = pixel >> 16; *dp++ = pixel >> 24; break; case 33: // 32bpp MSB *dp++ = pixel >> 24; *dp++ = pixel >> 16; *dp++ = pixel >> 8; *dp++ = pixel; break; } } void TrueRenderControl::render(::Drawable d) { XGCValues gcv; gcv.cap_style = CapProjecting; int w = 255, h = 32; Pixmap p = XCreatePixmap(**display, d, w, h, _screen->depth()); XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(), ZPixmap, 0, NULL, w, h, 32, 0); //GC gc = XCreateGC(**display, _screen->rootWindow(), GCCapStyle, &gcv); // XXX + 1? unsigned char *data = new unsigned char[im->bytes_per_line * (h + 1)]; unsigned char *dp = data; for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8) renderPixel(im, dp, 0); for (int y = 0; y < 10; ++y) for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8) renderPixel(im, dp, _red_color_table[x] << _red_offset); for (int y = 0; y < 10; ++y) for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8) renderPixel(im, dp, _green_color_table[x] << _green_offset); for (int y = 0; y < 10; ++y) for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8) renderPixel(im, dp, _blue_color_table[x] << _blue_offset); for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8) renderPixel(im, dp, 0); printf("\nDone\n"); im->data = (char*) data; XPutImage(**display, p, DefaultGC(**display, _screen->screen()), im, 0, 0, 0, 0, w, h); //delete [] image->data; //image->data = NULL; XDestroyImage(im); XCopyArea(**display, p, d, DefaultGC(**display, _screen->screen()), 0, 0, w, h, 0, 0); XFreePixmap(**display, p); } } |